On Wed, Apr 11, 2012 at 9:14 AM, Javier Suarez <[email protected]> wrote:
> Hi... > I mean... the sampling rate of the uhd sink and source what refers to...? > I've since in some documents that if you are transmitting , you have to > take in account that the DAC for output works at 128 M/s and the sample > rate for the UHD sink block has to be determined somewhow from that. > > In the same way the ADC for reception works at 64 M/s and the sampling > rate for the UHD source block has to be determined somehow from that 64 M/s > . > > I just want to make simple transmission and reception. > > Am I wrong? or I am understanding not really good what I am reading about > this. Thanks in advance. Don't worry about the USRP native rate (64/128Msps). The FPGA inside the USRP handles interpolation and decimation to step from the sample rate of the USB interface (0.5Msps to 8Msps) to the ADC/DAC rate (64Msps/128Msps). The sample rate you choose should be the sample rate that is appropriate for your application. --n > > > > > On Wed, Apr 11, 2012 at 10:58 AM, Nick Foster <[email protected]> wrote: > >> On Wed, Apr 11, 2012 at 8:53 AM, Javier Suarez <[email protected]>wrote: >> >>> Hi everyone... >>> I am getting confused about the use of the parameter of sampling rate in >>> GNU RADIO. >>> I really need to understand the sampling rate of the uhd sink and >>> source and the sampling rate of the blocks in the flow graph and how to >>> choose those sampling rates. >>> >>> Thanks a lot for you help!! >>> >> >> Sample rate is a fundamental parameter of digital signal processing. Try >> an introductory DSP textbook, or the following articles: >> http://en.wikipedia.org/wiki/Discrete_signal >> http://en.wikipedia.org/wiki/Sampling_rate >> http://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem >> http://en.wikipedia.org/wiki/Sampling_(signal_processing) >> http://en.wikipedia.org/wiki/Aliasing >> >> Without a basic understanding of sampling theory or DSP you will have >> difficulty progressing with Gnuradio. >> >> --n >> >> >> >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> [email protected] >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >> >
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